atomic families Flashcards
1
Q
how is the periodic table ordered?
A
atomic number. The answer to how elements had repeating properties at regular intervals was atomic structure).
2
Q
what was the deal with Dimitri Mendez?
A
He created a periodic table out of cards he printed the name of the elements out of. He ordered them by their atomic mass, and doing so found out that their properties repeated at regular intervals.
limits: his work wasn’t able to explain how it repeated at regular intervals.
3
Q
why is the periodic table ordered in rows and properties?
A
rows: atomic number
columns: similar properties
4
Q
what is an atomic structure?
A
a
5
Q
what is similar between all metals?
A
- ductile or malleable
- shiny
- good or excellent electricity conductors
- solid in room temperature
6
Q
what is similar between all non-metals?
A
- brittle
- poor electricity conductors
- gas or liquid at room temperature
- dull
7
Q
what is similar between all metalloids?
A
- brittle
- shiny or dull
- good or poor electricity conductors
- solid at room temperature
8
Q
what is radioactive?
A
a
